uname:
Linux mail 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux
root@mail:~# hdparm -tT /dev/sdd
/dev/sdd:
Timing cached reads: 534 MB in 2.00 seconds = 266.84 MB/sec
Timing buffered disk reads: 306 MB in 3.01 seconds = 101.70 MB/sec
root@mail:~# hdparm -tT --direct /dev/sdd
/dev/sdd:
Timing O_DIRECT cached reads: 160 MB in 2.01 seconds = 79.63 MB/sec
Timing O_DIRECT disk reads: 328 MB in 3.01 seconds = 109.11 MB/sec
dd, cp and rsync top out at write of 33mbs
General system description (see attached tarball for detailed files):
Motherboard: ASUS a7m266-D
CPU: Dual AMD Althon 2.8 (Barton core)
Memory: 3gb
Disk controller 1: Promise tx2 SATA 150+ (holds individual data disks: 400gb PATA UDMA 133, 400GB SATA 150. Sits on 64bit 66mhz bus, runs at 66mhz, 32 bits
Disk controller 2: Promise tx4310 (holds four Segate 500 gb sata 3gb es.2 class drives). Sits on 64bit 66 mhz bus, runs at 66mhz, 32bit
Disk controller 3: AMD motherboard PATA channel 0 disabled, Channel 1 holds a pata udma/66 cd rom
NB: the dmesg shows allot of mdadm software raid activity -- I discoved the problem while benchmarking a new software raid array. The problem occurs regardless of where I copy the file to -- individual drive, part of the array, two drives ont eh same card or one drive on a sata card and one drive on the amd pata (not shown in dmesg).
So yes, the problem seems to exist on ubuntu 8.04.
Hi,
I'm apparently impacted this bug as well:
uname:
Linux mail 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux
root@mail:~# hdparm -tT /dev/sdd
/dev/sdd:
Timing cached reads: 534 MB in 2.00 seconds = 266.84 MB/sec
Timing buffered disk reads: 306 MB in 3.01 seconds = 101.70 MB/sec
root@mail:~# hdparm -tT --direct /dev/sdd
/dev/sdd:
Timing O_DIRECT cached reads: 160 MB in 2.01 seconds = 79.63 MB/sec
Timing O_DIRECT disk reads: 328 MB in 3.01 seconds = 109.11 MB/sec
dd, cp and rsync top out at write of 33mbs
General system description (see attached tarball for detailed files):
Motherboard: ASUS a7m266-D
CPU: Dual AMD Althon 2.8 (Barton core)
Memory: 3gb
Disk controller 1: Promise tx2 SATA 150+ (holds individual data disks: 400gb PATA UDMA 133, 400GB SATA 150. Sits on 64bit 66mhz bus, runs at 66mhz, 32 bits
Disk controller 2: Promise tx4310 (holds four Segate 500 gb sata 3gb es.2 class drives). Sits on 64bit 66 mhz bus, runs at 66mhz, 32bit
Disk controller 3: AMD motherboard PATA channel 0 disabled, Channel 1 holds a pata udma/66 cd rom
NB: the dmesg shows allot of mdadm software raid activity -- I discoved the problem while benchmarking a new software raid array. The problem occurs regardless of where I copy the file to -- individual drive, part of the array, two drives ont eh same card or one drive on a sata card and one drive on the amd pata (not shown in dmesg).
So yes, the problem seems to exist on ubuntu 8.04.
Sam S.